Memory Objects and High Virtual Storage Frames

Figure 1 shows a sample of the MEMORY OBJECTS AND HIGH VIRTUAL STORAGE FRAMES section if Enhanced DAT Facility 2 is available. Information about 1 MB frames and memory objects that can be backed by 1 MB frames is only available if Enhanced DAT Facility 1 is installed. Information about 2 GB frames and memory objects that are backed by 2 GB frames is only available if Enhanced DAT Facility 2 is installed.

All values in this section of the Paging Activity report are presented as MIN, MAX, and AVG values.

Figure 1. PAGING Report - Memory Objects and High Virtual Storage Frames

                                   P A G I N G  A C T I V I T Y                                       
                                                                                                                           PAGE    3
            z/OS V2R3                SYSTEM ID SYSF             DATE 10/27/2016            INTERVAL 10.29.700                      
                                     RPT VERSION V2R3 RMF       TIME 10.00.00              CYCLE 1.000 SECONDS                      
OPT = IEAOPT00                             MEMORY OBJECTS AND HIGH VIRTUAL STORAGE FRAMES                                          
------------------------------------------------------------------------------------------------------------------------------------
LFAREA                MAXIMUM                                                                                                      
------------------  ---------                                                                                                      
1 MB FRAMES              512M                                                                                                      
2 GB FRAMES               12G                                                                                                      
MEMORY OBJECTS       FIXED 1M   FIXED 2G     COMMON     SHARED  SHARED 1M                                                          
------------------  ---------  ---------  ---------  ---------  ---------                                                          
      MIN                   1          1         95          3          1                                                          
      MAX                   2          2         96          3          1                                                          
      AVG                   1          1         95          3          1                                                          
1 MB FRAMES         ------------ FIXED ------------   PAGEABLE  AVAILABLE     TOTAL                                                
------------------    MAXIMUM  AVAILABLE     IN-USE   --------  ---------  --------                                                
      MIN                 512        472         30        123    320,993   321,180                                                
      MAX                 512        482         40        125    320,995   321,180                                                
      AVG                 512        479         33        124    320,994   321,180                                                
2 GB FRAMES         ------------ FIXED ------------                                                                                
------------------    MAXIMUM  AVAILABLE     IN-USE                                                                                
      MIN                   6          4          1                                                                                
      MAX                   6          5          2                                                                                
      AVG                   6          5          1                                                                                
HIGH SHARED FRAMES      TOTAL       CENTRAL STORAGE  BACKED 1M                         AUX DASD    AUX SCM                          
------------------  ---------       ---------------  ---------                        ---------  ---------
      MIN           136902.1M                   605          1                                0        N/A                          
      MAX           136902.1M                   606          1                                0        N/A                          
      AVG           136902.1M                   605          1                                0        N/A                          
HIGH COMMON FRAMES      TOTAL       CENTRAL STORAGE  BACKED 1M      FIXED   FIXED 1M   AUX DASD    AUX SCM                          
------------------  ---------       ---------------  ---------  ---------  ---------  ---------  ---------                          
      MIN            17301504                32,982         70     12,773         30          0        N/A                          
      MAX            17301504                35,634         80     12,773         40          0        N/A                          
      AVG            17301504                33,853         73     12,773         33          0        N/A

Table 1. Fields in the Paging Activity report - Memory Objects and High Virtual Storage Frames
Field Heading	Meaning
LFAREA MAXIMUM	Amount of real storage available for 1 MB and 2GB pages as specified in the LFAREA parameter.
MEMORY OBJECTS	FIXED 1M Number of fixed memory objects that are allocated in the system and can be backed in 1 MB frames. FIXED 2G Number of fixed memory objects that are allocated in the system and are backed in 2 GB frames. COMMON Number of memory objects allocated in the high virtual common storage of the system. SHARED Number of memory objects allocated in the high virtual shared storage of the system. SHARED 1M Number of shared memory objects that are allocated in the system and can be backed in 1 MB frames.
1 MB FRAMES	FIXED MAXIMUM Maximum number of 1 MB frames that can be used by fixed 1 MB pages. This value is specified in the LFAREA parameter. FIXED AVAILABLE Number of available 1 MB frames that can be used by fixed 1 MB pages. FIXED IN-USE Number of 1 MB frames that are in-use by fixed 1MB pages. PAGEABLE Number of 1 MB frames that are in-use by pageable 1 MB pages. AVAILABLE Number of available 1 MB frames in central storage. TOTAL Total number of 1 MB frames in central storage.
2 GB FRAMES - FIXED	MAXIMUM Maximum number of 2 GB frames that can be used by fixed 2 GB pages. This value is specified in the LFAREA parameter. AVAILABLE Number of available 2 GB frames that can be used by fixed 2 GB pages. IN-USE Number of 2 GB frames that are in-use by fixed memory objects.
HIGH SHARED FRAMES	TOTAL Size of high virtual shared area in units of 4 KB pages. CENTRAL STORAGE Number of pages from high virtual shared storage that are backed in central storage (in units of 4 KB). BACKED 1M Number of high virtual shared memory 1 MB pages that are backed in central storage. AUX DASD Number of auxiliary storage slots used for high virtual shared pages that are backed on DASD. AUX SCM Number of auxiliary storage slots used for high virtual shared pages that are backed on SCM storage.
HIGH COMMON FRAMES	TOTAL Size of high virtual common area in units of 4 KB pages. CENTRAL STORAGE Number of pages from high virtual common storage that are backed in central storage (in units of 4 KB). BACKED 1M Number of high virtual common memory 1 MB pages that are backed in central storage. FIXED Number of pages from high virtual common storage that are fixed in central storage (in units of 4 KB). FIXED 1M Number of high virtual common memory 1 MB pages that are fixed in central storage. AUX DASD Number of auxiliary storage slots used for high virtual common pages that are backed on DASD. AUX SCM Number of auxiliary storage slots used for high virtual common pages that are backed on SCM storage.